Who can view a shared story on Snapchat?

Your friends on Snapchat can see the shared stories if you have allowed them to. It depends on your privacy settings.

Anyone with the link or permission to access the shared story can view it.

Yes, Snapchat has certain tracking mechanisms that can detect if you shared a story.

Pretty much anyone who has been given access or permission to view them.

No. Snapchat is mainly concerned with the creation and dissemination of stories by users themselves. It doesn't keep tabs on whether a story has been shared further.

Yes, you can. But it might require using a web browser and logging in to your Snapchat account.

If the person who shared the story has a public profile, you could try looking for it on their profile. Another option is to ask the person to resend it to you if possible.

No, Snapchat doesn't seem to be able to detect if you've shared someone else's story. There's no feature that gives an indication of such a thing.

Yes, Snapchat can notify others when you view their story. There's a feature that shows the list of people who have viewed a particular story. However, some users might have privacy settings that limit this visibility, like making their story viewable but not showing who has viewed it.

Maybe they don't have Snapchat installed or their app is having issues. It could also be that they aren't on your friends list or you accidentally restricted their access.